Operation of a high-T-C SQUID gradiometer with a two-stage MEMS-based Joule-Thomson micro-cooler
Journal article, 2016

Practical applications of high-T-C superconducting quantum interference devices (SQUIDs) require cheap, simple in operation, and cryogen-free cooling. Mechanical cryo-coolers are generally not suitable for operation with SQUIDs due to their inherent magnetic and vibrational noise. In this work, we utilized a commercial Joule-Thomson microfluidic two-stage cooling system with base temperature of 75 K. We achieved successful operation of a bicrystal high-T-C SQUID gradiometer in shielded magnetic environment. The micro-cooler head contains neither moving nor magnetic parts, and thus does not affect magnetic flux noise of the SQUID even at low frequencies. Our results demonstrate that such a microfluidic cooling system is a promising technology for cooling of high-T-C SQUIDs in practical applications such as magnetic bioassays.




high-T-C planar SQUID gradiometers






applied physics letters

superconducting quantum interference device

klich ah



Alexei Kalaboukhov

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

E. J. de Hoon

Kryoz Technologies B.V.

K. Kuit

Kryoz Technologies B.V.

Ppppm Lerou

Kryoz Technologies B.V.

Maxim Chukharkin Leonidovich

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Justin Schneiderman

University of Gothenburg

Sobhan Sepehri

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Anke Sanz-Velasco

IMT Masken und Teilungen AG

Aldo Jesorka

Chalmers, Chemistry and Chemical Engineering, Chemistry and Biochemistry, Physical Chemistry

Dag Winkler

Chalmers, Microtechnology and Nanoscience (MC2), Quantum Device Physics

Superconductor Science and Technology

0953-2048 (ISSN) 1361-6668 (eISSN)

Vol. 29 9

Areas of Advance

Nanoscience and Nanotechnology (2010-2017)

Subject Categories

Electrical Engineering, Electronic Engineering, Information Engineering

Nano Technology



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